Science Review: Materials and Their Uses
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Questions and Answers

What is the conservation method that involves making less garbage?

  • Rebuild
  • Reduce (correct)
  • Recycle
  • Reuse
  • Which statement correctly defines reproduction?

  • The adults make offspring. (correct)
  • The offspring makes an exact copy of an adult.
  • The offspring makes the exact opposite of the adult.
  • The parents make an offspring.
  • Why is reproduction important to an organism?

  • Because it controls body parts.
  • Because it collects and removes waste.
  • Because it damages body parts.
  • Because it ensures continued presence of the organism. (correct)
  • Which part of the male reproductive system protects the testis?

    <p>Scrotum</p> Signup and view all the answers

    What part of the female reproductive system releases the egg cells and hormones?

    <p>Ovary</p> Signup and view all the answers

    What term marks the start of being a teenager?

    <p>Adolescence</p> Signup and view all the answers

    What physical change might Paola have noticed on her body?

    <p>Enlarged breasts</p> Signup and view all the answers

    What physical change did Raymond notice on Adam's neck?

    <p>Physical change</p> Signup and view all the answers

    Which of the following changes occur in both boys and girls during puberty?

    <p>II, V, and VII</p> Signup and view all the answers

    What type of motion does an object undergo when moving in a straight line?

    <p>Rectilinear motion</p> Signup and view all the answers

    What is a reference point in physics?

    <p>Reference point</p> Signup and view all the answers

    How can a biker travel a great distance in a specified time?

    <p>Maintain a consistent high speed</p> Signup and view all the answers

    Which group of materials is used for our body?

    <p>baby powder, cologne, lotion, and soap</p> Signup and view all the answers

    What is NOT usually added to processed food?

    <p>indelible ink</p> Signup and view all the answers

    Which material is NOT useful for cleaning a bathroom?

    <p>fabric conditioner</p> Signup and view all the answers

    How can you determine if a household material is harmful?

    <p>Both A and B</p> Signup and view all the answers

    Why are metals useful?

    <p>Because it is hard and can be made into different shapes</p> Signup and view all the answers

    When is a material considered useful?

    <p>If it can serve its purpose</p> Signup and view all the answers

    What is the primary effect of pedaling faster on a bike?

    <p>Increase the speed of the bike</p> Signup and view all the answers

    What is the correct unit of speed?

    <p>Meter per second</p> Signup and view all the answers

    A car travels at a constant speed of 20 meters per second. How far will it travel in 10 seconds?

    <p>200 meters</p> Signup and view all the answers

    What is your speed if you move 10 meters in 5 seconds?

    <p>2 meters per second</p> Signup and view all the answers

    Which of the following materials is NOT a good conductor of heat and electricity?

    <p>Rubber</p> Signup and view all the answers

    What is the process of breaking down of rocks into smaller pieces?

    <p>Weathering</p> Signup and view all the answers

    What can cause rocks to break?

    <p>Water that seeps into the pores and cracks of rocks</p> Signup and view all the answers

    How do plants serve as agents of weathering?

    <p>Roots of plants that grow in rocks and cause them to break</p> Signup and view all the answers

    What is the effect of very strong winds of public storm signal #4 on the transportation system?

    <p>It is unsafe to travel both in air and in sea</p> Signup and view all the answers

    What can be greatly damaged by typhoons?

    <p>All of the above</p> Signup and view all the answers

    What is the best strategy for residents to ensure safety when a weather disturbance threatens low-lying coastal areas?

    <p>Evacuate to a higher safer place</p> Signup and view all the answers

    What is NOT a negative effect of typhoons?

    <p>It fills up dams and replenish water supply</p> Signup and view all the answers

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